Abstract:Using substation sampling information, this paper proposes a realization method for zone area hierarchical protection system. The system is mainly composed of communication network, substation regional protection level and zone area hierarchical protection level. The informations will be sent to the regional protection by communication system, which realizes regional information on sharing. Finally, after obtaining substation panoramic information, according to power system operation, typology structure, and the change of fault types and load of each power supply and distribution line, zone area hierarchical protection cooperates with the regional protection, uses regional information for fault location, and realizes the system oriented protection.